Unfortunately you're right, but it's the only thing I've been able to get.
/sarcasm Damn people, you just keep expecting the numbering to make sense! sarcasm/
So you're right. Either a) it was a numbering FUBAR and a short chapter or b) something happens between pages 338 and 348. It actually rolled pretty smoothly to my mind so I wasn't checking.
We'll have to leave it up to the authorities with access to the sub to resolve the issue. Either way, we're ready for the continuation with anticipation.
Peace brothers and sisters. As pirates we wait for opportunity.
Edited 10 minutes or so later:
Also missing 355, 358-63, 369-380 and 384-6. It's amazing what I miss when the story hangs together

.
I think I may have discovered something. On Patreon Tab109 puts up full sized pictures accessible at variable intervals.
Right now you can get 350-2, 364-6, 387-9. 372-4, 384-6 and 390-1 are locked w/out a sub.
I'm seeing part of a pattern here. So there.