I'm still using the #2 version, but since I deleted the following files yesterday, there is no more garage freezing issue. Also the other problem with failure to display some battle results is also gone. Loading time after finishing battle is significantly improved as well. I feel 99% one or more of these files are the culprit.
poliroid.modslistapi_1.3.1.wotmod
poliroid.pmod_1.47.0.wotmod
proficiency_fix.wotmod
There is log saying loading script failure but it does not affect playing at all.