Eu estava tendo o mesmo problema recentemente e essa solução de um grupo do Google resolveu isso para mim.
Assim, você precisa visualizar novas guias e atualizar a página do histórico: chrome: // history / e, em seguida, clicar no botão "Guias de outros dispositivos" para recuperá-las.
I found that a device's tabs were again visible once I had again accessed the tabs in the device's browser, then refreshed the history and clicked "Tabs from other devices" yet again.
In short, it appears that "Hide for now" removes your device's most recent viewing session. While I haven't yet found a way to restore the viewing session, you can again see the device's recent tabs after you've viewed new tabs (or reloaded the same tabs) on the device.