Delays and ERR_NETWORK_CHANGE browsing on Mac

I am using the NextDNS app version 1.5 (20) on Mac OSX 11.6, using the Brave browser. I frequently experience delays loading web pages, and the browser displays an ERR_NETWORK_CHANGED error. The page will then sometimes automatically load properly, or I have to hit reload to view the page. When this happens I see errors such as the following in the NextDNSProxy logs on my Mac:

error 12:05:47.426642-0400 NextDNSProxy Task <2C30DD01-51C9-4C97-9702-7C7C07A3CD25>.<114> HTTP load failed, 0/0 bytes (error code: -1009 [1:50])
error 12:05:47.427123-0400 NextDNSProxy Task <2C30DD01-51C9-4C97-9702-7C7C07A3CD25>.<114> finished with error [-1009] Error Domain=NSURLErrorDomain Code=-1009 UserInfo={_kCFStreamErrorCodeKey=50, NSUnderlyingError=0x7fed87722af0 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 UserInfo={_kCFStreamErrorCodeKey=50, _kCFStreamErrorDomainKey=1}}, _NSURLErrorFailingURLSessionTaskErrorKey=<private>, _NSURLErrorRelatedURLSessionTaskErrorKey=<private>, NSLocalizedDescription=<private>, NSErrorFailingURLStringKey=<private>, NSErrorFailingURLKey=<private>, _kCFStreamErrorDomainKey=1}
error 12:05:51.430731-0400 NextDNSProxy Task <5A850BB7-E5D8-424F-8EBE-FA03257781CD>.<18667> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 UserInfo={_kCFStreamErrorCodeKey=-2102, NSUnderlyingError=0x7fed8742ecc0 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, _NSURLErrorFailingURLSessionTaskErrorKey=<private>, _NSURLErrorRelatedURLSessionTaskErrorKey=<private>, NSLocalizedDescription=<private>, NSErrorFailingURLStringKey=<private>, NSErrorFailingURLKey=<private>, _kCFStreamErrorDomainKey=4}
error 12:05:52.433355-0400 NextDNSProxy Task <5700E1E2-4449-4EAF-B71D-4539F5A92014>.<115> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 UserInfo={_kCFStreamErrorCodeKey=-2102, NSUnderlyingError=0x7fed8767ba80 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, _NSURLErrorFailingURLSessionTaskErrorKey=<private>, _NSURLErrorRelatedURLSessionTaskErrorKey=<private>, NSLocalizedDescription=<private>, NSErrorFailingURLStringKey=<private>, NSErrorFailingURLKey=<private>, _kCFStreamErrorDomainKey=4}
error 12:05:52.447524-0400 NextDNSProxy Connection 1229: received failure notification
error 12:05:52.447556-0400 NextDNSProxy Connection 1229: failed to connect 1:50, reason -1
error 12:05:52.447582-0400 NextDNSProxy Connection 1229: encountered error(1:50)
error 12:05:52.449023-0400 NextDNSProxy Task <81A554EC-527C-4727-9913-8A4C68F861E3>.<116> HTTP load failed, 0/0 bytes (error code: -1009 [1:50])
error 12:05:52.449378-0400 NextDNSProxy Task <81A554EC-527C-4727-9913-8A4C68F861E3>.<116> finished with error [-1009] Error Domain=NSURLErrorDomain Code=-1009 UserInfo={_kCFStreamErrorCodeKey=50, NSUnderlyingError=0x7fed87520910 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 UserInfo={_kCFStreamErrorCodeKey=50, _kCFStreamErrorDomainKey=1}}, _NSURLErrorFailingURLSessionTaskErrorKey=<private>, _NSURLErrorRelatedURLSessionTaskErrorKey=<private>, NSLocalizedDescription=<private>, NSErrorFailingURLStringKey=<private>, NSErrorFailingURLKey=<private>, _kCFStreamErrorDomainKey=1}