I've narrowed it down to IE. With the following example it will do it every time. Edit the dashboard and just change the last underscore in the title to a space or back. Or change the drilldown from cell to row or back. Save and refresh the page. I tested with MS Edge and Firefox and neither had the problem.
James_Test_dash_strip_test
<panel>
<table>
<title>Top Host,Index and Sourcetype Today</title>
<search>
<query>index=_internal source="/opt/splunk/var/log/splunk/license_usage.log" type=Usage | stats sparkline(sum(b),1h) as Today, sum(b) as Bytes,latest(poolsz) as poolsz by h,idx,st | eval Gbytes=round(Bytes/1024/1024/1024,2) | eval lic=round(poolsz/1024/1024/1024,0) | eval Lic_Pct=round(Gbytes/lic*100,2) | sort -Gbytes | head 10 | fields - lic,poolsz,Bytes | rename idx AS index | rename h AS host | rename st AS sourcetype</query>
<earliest>@d</earliest>
<latest>now</latest>
</search>
<option name="drilldown">row</option>
<option name="wrap">false</option>
</table>
</panel>
... View more
