Can't export/import MTM version

If I export and then import the same Version from MTM then it shows the last 5 or so Triggers from the export as having been deleted. If i look in the file, they’re there, and the last 5 triggers listed in the file. Looking in my new draft, they are not there, so they really are being dropped.

Developer console shows:
https://[myserver]/index.php?method=TagManager.importContainerVersion&idContainer=IABWpRr4&backupName=&module=API&format=JSON&idSite=1&period=day&date=yesterday 500
(anonymous) @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:209
s @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:204
(anonymous) @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:202
(anonymous) @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:236
$digest @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:248
$apply @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:251
(anonymous) @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:1510
setTimeout (async)
onClickOutsideElement @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:1510
dispatch @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:5
r.handle @ index.php?module=Proxy&action=getCoreJs&cb=4d40065b75c338d40ff3080bf9cd9ba5:5

Fixed, it was hitting the php limit of 30 seconds execution time: https://matomo.org/faq/troubleshooting/faq_103/

Matomo’s user interface REALLY needs to show an error when this (server returning a 500) happens. Even a vague “Server encountered an error” type thing would have pointed me in the right direction and saved a lot of time.

Don’t hesitate to post an issue in the Matomo GitHub repo: