Just had it happen again after switching to DirectX 11 as a test. Curiously, this time it didn’t crash, but WoW is using 28 GB of ram after a minute long hang. The game still plays for a while after, but this is really taxing on my system since it just filled my page file with 20+GB of garbage. I ran /console gxrestart and the WoW is STILL using the 28 GB of memory unfortunately, so it isn’t as easy to come back from as the leak from November: Memory Leak - #17 by Rommax-1333
EDIT: The longer I play like the the more my page file gets used. I’m at 40 GB in my page file now (up from 20 GB), and WoW.exe still only claims it’s using 26ish GB. I’m only running WoW and a system monitor.