For only a couple days now, when I open my bags to clean them i notice several rows of my items disappear. They go invisible and can't be touched until I close wow, update the addon, and enter the game again. Very frustrating to have to do every time i come back to town because my items are disappearing. I know this is the addon because its client side, whenever I disable the addon the items reappear in my inventory.

Have you tried just reloading the UI rather than restarting WoW? /script ReloaduI(); I've noticed similar behavior when my video driver has crashed and reloaded... but a UI reload clears it up.

Having the same issue with my bags, I have updated to 6.1.5. My miner's coffee keep disappearing. I can't get the work around to work like Domek97

I just figured out what was happening it was an error on my part you can select which bags that you display at the top when the bags changer is highlighted and it one of my bags wasn't highlighted