Both problems relate to the WNRO...TomTom released a new navcore 9.541 back in December 2018 to address both of these issues:
TomTom wrote:Version 9.541Released on 19 December 2018 This update applies to: XXL Classic, ONE IQ Routes, XL IQ Routes, XL IQR2 / XL Classic, GO 750, GO 750 LIVE, GO 950, GO 950 LIVE, GO 540 LIVE, GO 740 LIVE, GO 940 LIVE, GO 530, GO 630, GO 730, GO 930, GO 720, GO 520, GO 920, EASE, ONE 140, Start
• Maintenance Release.
• This update prepares your navigation device for the week number rollover in April 2019 which has an impact on GPS.
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Do a full backup of your device first > then extract the new navcore to your device overwriting everything > then re-patch the new navcore with FastActivate option 3