iOS 10.3.2 Betas are the worst so far, particularly the Beta 4. Beta 5 is slightly better but is still way off the mark regarding the problem of phone getting heated up even while on standby.
They are even worse than the public release iOS 10.3.1 (14E304).
I think the best among all these was iOS 10.3.2 Beta 3 (14F5080a).
Are we expecting a Beta 6 for iOS 10.3.2 which resolves the heating problem.
If so, what are the expected dates?