How can I not read the cache when the browser goes back?

the problem is this:
A payment page has a payment countdown, and then click to pay to jump to the corresponding Alipay or bank card payment interface. At this time, if you click the browser"s return button to return to the payment page, the payment countdown still starts from the previous value. The cause of the problem should be that the cache was read.
is there any solution?
tried to use reload but felt unreliable.

Oct.25,2021

clear that timer when leaving the payment page through the onbeforeunload event,

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