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Could you initialize the Treshold Sizes according the Fluid Content Control
article. In this article we are suggesting with same threshold values, for example:
SmallToNormalThreshold(291px X 130px) - . . .
NormalToSmallThreshold(291px X 130px) - good advice is to set it to the same size as the SmallToNormalThreshold in order to avoid ambiguous situations in which there is a range of values that remains between the two adjacent thresholds (which results in a cycle). This threshold is used when the normal content is visible and the available space is decreasing. Thus, setting the threshold to a value equal to the size of the normal content, will hide the normal content as soon as the available size is not enough to properly render the normal content.
Please follow the instructions and if the problem still exists you can send your project to us in order to investigate the issue.
All the best,
the Telerik team
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