If you are using pqtooltip in pqgrid, please apply this patch, it applies to v9.0.2 only.
Add it after including pqgrid js file and before initialization of any pqgrid. It can be added in script tags or a js file.
Angular, React, Vue users can add it by importing $ and add the code below.
$.paramquery.pqGrid.prototype.getCell=function(e){if(e){e.vci>=0&&(e.colIndx=this.iCols.getci(e.vci));var i=this.normalize(e),r=i.rowIndxPage,t=i.colIndx,l=this.iRenderB.getCell(r,t)}return $(l)};