The Rostelecom-cloudflare connection has not been working for the last few days?

Question

CDN

There is a site. In the last few days, some customers have been complaining about the problem with loading a couple of pages (large amount of data) and downloading a couple of files (40+ megabytes).
One thing unites them all - the provider Rostelecom.
There are no problems with other providers.
I searched the network for new problems in a bunch of cloudflare-rostelecom - empty. Only news related to the RKN and cloudflare blocking many months ago.
Through a proxy the same pages/files remarkably open.
Are there any solutions for leaving cloudflare?
An example of a file download log using wget

wget https://example.com/download/somebigfile
--2018-11-25 12:47:19--  https://example.com/download/somebigfile
Resolving example.com... 1.2.3.4
Connecting to example.com|1.2.3.4|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 42875077 (41M) [application/octet-stream]
Saving to: ‘somebigfile’

https://example.com/download/somebigfile                                0%[                                                                                                               ]  15.74K  --.-KB/s    in 30s

2018-11-25 12:47:51 (546 B/s) - Connection closed at byte 16122. Retrying.

And the last line is constantly repeated, wget tries to download, and the connection breaks.