Topic on Extension talk:Flex Diagrams/Flow

When I open an existing Drawio graph and edit it for the first time during a session, then click the in-graph save button and then the page save button, the page saves and displays as expected. When I do a second edit to the same diagram, the post-save view shows the old version of the diagram.

• This is the same on three wikis, two in shared hosting and one on our own linux server.
• I tried this in Firefox and Edge, same behaviour. I stripped a test wiki down to the minimum with no additional extensions beyond FlexDiagram, same problem.
• A refresh or ctrl-shift refresh don't fix the issue. Running update.php and re-loading the page displays the post-second-edit diagram.
• cache is off:

$wgMainCacheType = CACHE_NONE;
$wgMemCachedServers = [];

• I tried this with extension MagicNoCache, it doesn't fix the problem.
• version: 0.5.2 (c6271e2) 01:28, 10 May 2024
• installed via git pull and git checkout REL1_41
• PHP is 7.4.28 on my clean test system, and I realize that's outdated and am now trying to get that updated; however, the two other wikis with the same problem both use 8.1.27 so I don't really think that's the problem

This is the same as the "Can't save" discussion, no? (Though expressed more clearly.)

Definitely part of the same troubleshooting for me, you are right. That other discussion had diverged from the original problem of an ongoing hourglass and then the error. I also don't get the blank page from which I can't get into the editor any more. So the previous one was getting very muddled and I decided to start fresh with what is actually still a problem. I figured that would also make it easier for anyone else with the same, remaining problem to find this. And, for that problem I wasn't able to replicate it on my other install. For this one, the same problem happens on three different installs in two different environments.