Signature add-on has become unresponsive

URL: Outside Contractor Registration - Brunswick Landing Marina

The signature area is not allowing people to sign anymore… We have not done anything to change the backend except updating plugins.

We have 3 or 4 reports of users saying the signature box will not accept their signature. Most of them are going through ok so this seems like an issue only for some users. We had one user test on mobile and desktop with chrome and safari and had same issue. I wondered if it was a firewall or something local since it did not seem specific to one device for this user