During test EmEditor v17.5.0 beta 2, there is a problem in some special case.
Duplicate method:
1. Open “zen_emeditor.jsee” (488,276 bytes, downloaded from EE Library)
2. Use TSV mode
3. Drag AutoFill handle from A1 to A3, Click the button and select “Continue AutoFill and Overwrite”
I couldn’t reproduce the issue, and it might be due to your particular settings. Please zip a crash report file along with your settings (including AppData folder) exported from Tools menu > Import and Export > Export all settings into a registry file. You can email the file to tech @ emurasoft.com