We've got a Maniphest task with about 35 comments on it. However, not all users see the same set of comments. I looked at what 3 different users are seeing. I see most of the comments, but one is missing for me. Another employee can see the one I can't, but she doesn't see one of the comments that I do see. A 3rd employee can see all the comments. We did refresh our screens and we did all click "show older changes".
The task in question does have a custom "Visible to" and "Editable by" policy on it. Both policies are set to allow all members of 2 particular project access. All members of those projects can see the task and most of the comments, but as noted above, different comments are missing for different users. It is also the case that the policy for this task changed a few times as different teams were added and/or removed.
There is client data in this bug so I'm not able to post screen shots here, but I'd be happy to do a Google hangout or some other kind of screen share and show one of your devs what we're seeing. Would also be happy to run some DB queries and pull out info that might help you debug (provided, of course, that it doesn't contain our client's info).
Here's some info from the DB that I imagine will be helpful:
```
mysql> select id, phid, viewPolicy, editPolicy from maniphest_task where id = 379;
+-----+--------------------------------+--------------------------------+--------------------------------+
| id | phid | viewPolicy | editPolicy |
+-----+--------------------------------+--------------------------------+--------------------------------+
| 379 | PHID-TASK-ohryaocaq7mybmqe3c3r | PHID-PLCY-j6vwnxdwqxq35tjl6ra2 | PHID-PLCY-jowns5fip6e3zffyp57w |
+-----+--------------------------------+--------------------------------+--------------------------------+
mysql> select viewPolicy, editPolicy, transactionType from maniphest_transaction where objectPHID = 'PHID-TASK-ohryaocaq7mybmqe3c3r';
+------------+--------------------------------+------------------+
| viewPolicy | editPolicy | transactionType |
+------------+--------------------------------+------------------+
| public | PHID-USER-th45gzwtazm7dvpwpprm | title |
| public | PHID-USER-th45gzwtazm7dvpwpprm | description |
| public | PHID-USER-th45gzwtazm7dvpwpprm | status |
| public | PHID-USER-th45gzwtazm7dvpwpprm | priority |
| public | PHID-USER-th45gzwtazm7dvpwpprm | reassign |
| public | PHID-USER-th45gzwtazm7dvpwpprm | ccs |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:edge |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:customfield |
| public | PHID-USER-iiauggap6fo5jutog3qw | core:comment |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:comment |
| public | PHID-USER-th45gzwtazm7dvpwpprm | ccs |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:comment |
| public | PHID-USER-iiauggap6fo5jutog3qw | core:comment |
| public | PHID-USER-th45gzwtazm7dvpwpprm | reassign |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-th45gzwtazm7dvpwpprm | ccs |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:view-policy |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:edit-policy |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | ccs |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:edge |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-iiauggap6fo5jutog3qw | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | ccs |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-nhkvwuyez26jwy2zojr7 | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-nhkvwuyez26jwy2zojr7 | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | ccs |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:view-policy |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:edit-policy |
| public | PHID-USER-fsvhlyx42kfbrvseszpn | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-nhkvwuyez26jwy2zojr7 | core:comment |
| public | PHID-USER-iiauggap6fo5jutog3qw | core:comment |
| public | PHID-USER-nhkvwuyez26jwy2zojr7 | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-iiauggap6fo5jutog3qw | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-th45gzwtazm7dvpwpprm | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-j5psp2to2gbyo224525v | core:comment |
| public | PHID-USER-j5psp2to2gbyo224525v | ccs |
| public | PHID-USER-cr6jmq4eltuai37khehl | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-pkho3p4pfdh22kyfw6en | core:comment |
| public | PHID-USER-j5psp2to2gbyo224525v | core:comment |
+------------+--------------------------------+------------------+
```
For my reference if you have follow up questions: the task is T379