Has been working well for my Canvas/imageSprite issue and now the slider thumb position issue.
I'll keep it in mind if I start seeing a return to unexpected behaviour on these elements.
Perhaps it's not so much about what the timer delay is set at, but rather when within the nitty-gritty of the compilation that the timer is first initiated. It may be one of the last things to kick-off in the process of setting global variables, overriding defaults, setting up the screens etc, so the actual timer interval may not matter so much for some elements.