We have the same issue; our deployment enviroment is 12.7.x, and our development is 14.x/15.x. We have found this workaround:
SEL clipsToSelector = NSSelectorFromString(@"setClipsToBounds:");
if ([self respondsToSelector:clipsToSelector]) {
[self performSelector:clipsToSelector withObject:@(YES)];
}
clipsToSelector = nil;