I’ll not comment on the version as I can fully understand why you might want to stay on a older version. That is your choice so don’t just assume a upgrade will fix your problem, it may not.
Regardless, I believe this is one specific problem you will NEED to fix …
Nov 13, 2022 11:17:48.388 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle" (13: Permission denied)
Nov 13, 2022 11:17:48.546 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/1. Family Pics" (13: Permission denied)
Nov 13, 2022 11:17:48.546 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/1. Family Pics/Duff Family Oldies" (13: Permission denied)
Nov 13, 2022 11:17:48.555 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/1. T-C-B" (13: Permission denied)
Nov 13, 2022 11:17:48.561 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/1. T-C-B/Wife" (13: Permission denied)
Nov 13, 2022 11:17:48.562 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/1. T-C-B/Just Us" (13: Permission denied)
Nov 13, 2022 11:17:48.562 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/1. T-C-B/Just Us/Random Pics of us" (13: Permission denied)
Nov 13, 2022 11:17:48.566 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/0. Sort" (13: Permission denied)
Nov 13, 2022 11:17:48.576 [0x7fa690518700] ERROR - [Notify] Failed to add watch for "/volume1/Photo/#recycle/0. Sort/The house before" (13: Permission denied)
As you are running plex on a Synology you will most likely need to increase the number of folders the plex can monitor (that’s the Notify error) → Synology FAQ - Questions, Answers, and a few How-To's - #22 by ChuckPa
I would fix that first and see if things improve. If not then I’d look at permissions, reclaiming your server etc… If after all that you still have the same problems then a new set server logs will be helpful so the community can assist you. Good luck.
