To resolve this issue, please include the following patch in your project. It must be loaded after the pqgrid.js library to function correctly.
!function(e){e(document).off(".pqExcel").on("keydown.pqExcel",function(c){var t,n,i=e(document.activeElement),l=i.parent(),o=l.is(".pq-focus-mgr:not(.pq-editor-outer)"),r=o,p=c.key,E=c.keyCode,u=e.ui.keyCode,g=e=>{t=i.closest(".pq-grid"),n=t.pqGrid("instance")};if(!o||E!=u.UP&&E!=u.DOWN||c.preventDefault(),o&&E==u.DELETE&&(g(),n?.clear()),pq.isCtrl(c)&&r&&(g(),gExcel||i.length&&n)){if(!gExcel)try{if(n.options.selectionModel.native)return!0;gExcel=new cExcel(n)}catch(e){return!0}i=gExcel.initClip(i,l),"f"!=p&&"F"!=p||e(document).trigger("keyup.pqExcel")}}).on("keyup.pqExcel",function(e){if(!pq.isCtrl(e)&&gExcel){gExcel=null}}).on("click.pqExcel keydown.pqExcel",function(c){"click"!=c.type&&e.ui.keyCode.ENTER!=c.keyCode||e(c.target).trigger("pq:clickE")})}(jQuery);
Kindly let me know if you need further assistance.