2 Signer unable to sign the document on cellphone

Description of the Issue:

When using Adobe Acrobat Sign on a mobile device, specifically involving two signers, the document requires signatures from both parties. The first signer successfully signs the document, and their signature appears as expected. However, wehn the second signer do the same the system still shows the message "One required field left" and does not allow the second signer to complete their signature. Eventhough all required fields are filled.

Expected Outcome:

This issue appears to be specific to mobile devices, signing works as expected on desktop platforms.

Both signers should be able to sign the document successfully, and the message "One required field left" should disappear after the second signature is added.