quizlet.com: unresponsive when clicking on internal links

[anfearrua]

I am a regular user of Quizlet both as a language learner and teacher. My main browser is Vivaldi. However, for a while now internal links have been unresponsive for a minute whenever I go on a new page on Quizlet.

This is not the case on Edge and Google Chrome. Quizlet is currently unusable on Vivaldi and I have to use a different browser for this website.

Is there anything I can do to solve this?

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modedit added link

[TbGbe]

@anfearrua Don't have a log-in, but the example page
e.g. https://quizlet.com/gb/516738253/high-frequency-words-general-vocabulary-french-gcse-91-flash-cards/

works OK for me.

Do they work for you or is the problem only after log-in?

[anfearrua]

@TbGbe Thank you very much for trying and coming back to me. After reading your answer and that of @Gwen-Dragon, I tried logging in and out. I have several accounts (as a secondary school teacher and a language learner) and my premium account seems to work flawlessly while the other (free) accounts and also using the website without account have this long delay when clicking internal links.
When I am doing the same in Google Chrome, there is no delay.

[anfearrua]

@Gwen-Dragon Thanks for your quick reply. I am using Bitdefender on Windows, no extensions to filter ads or for better privacy. I have blocked tracking but allowed it to test if it makes a difference. I am blocking 3rd party cookies but allowed them to test if there was any effect. For both, it didn't make a difference. As I wrot in the reply to @TbGbe , I worked out that this does not happen in my premium account. (I have diffeent accounts for different purposes.)