The new release 2025.2 uses different URLs for the periodic requests in the background:

URLs used in 2023.8

GET http://localhost:8080/WebGoat/service/lessonmenu.mvc HTTP/1.1
GET http://localhost:8080/WebGoat/service/lessonoverview.mvc HTTP/1.1

URLs used2025.2

GET http://localhost:8080/WebGoat/service/lessonmenu.mvc HTTP/1.1
GET http://localhost:8080/WebGoat/service/lessonoverview.mvc/HttpProxies.lesson HTTP/1.1

Thus the recommended exclude filter for ZAP (as stated in section "General/HTTP Proxies", step 4) should be adapted from
.*lesson.*.mvc
to
.*lesson.*.mvc.*

Alternative:
Go back to previous URLs.