No opening stash crashes without YAR so far. Only using 2 manual bots but, over 1 day no problem.
I am well aware it is not your problem, but it would be truly amazing if you (or anyone in the Db staff with programming skills) take a deep look at Yar to see what's going on. Right know a huge number of users use it and sadly the plugin creator has gone Giles cause of real life issues. Really, please , take a look at it!!!!!!!
So , let me ask you a question; in case no support for Yar is graciously given by you guys, would you recommend changing to Arelog? Haven't used it but it seemed to me it had fewer options than Yar, and some concerns from d3 users were not addressed. Thats why I've always reeled back when thinking about trying it.
On topic, 1.7.2.1 is working perfectly without Yar. Only issue is the increased CPU usage some users have already mentioned. I had to switch to 10 ticks instead of 30 on trinity, cause my cpu was peaking on 90+ , and I don't like it.