Dear @Mayuri.Patel @Shubham.Raghuvanshi Sir.
Please check that the header Images are not displayed on the Quotation Header
which seted Admin = PDF= Header
Some Examples Like
CRM: https://aptpl.sangamcrm.com/admin/pdf-settings?pdf_setting=d6f77250-da80-4e78-bf82-6a2f4618f0dc
MY CRM: https://jmdes.sangamcrm.com/quotations/6103c020-5310-4ddc-9eed-303a15098130