i can confirm this problem.
sometimes simply restarting NT helps. If not, i do right click - Template and save the chart layout into a temporary template. Then i close the chart, create a new one and apply the temporay template.
Sorted.

Annoying, but i can't be bothered to report any issues / bugs / enhancement requests to the NT folks anymore.

A quick follow up.

Since disabling the Bad Tick Filter 2 weeks ago I have had no more occurrences of the charts quiting updating price bars.