  We homogeneously reanalyse $124$ transit light curves for the WASP-4 b hot
Jupiter. This set involved new observations secured in 2019 and nearly all
observations mentioned in the literature, including high-accuracy GEMINI/GMOS
transmission spectroscopy of 2011-2014 and TESS observations of 2018. The
analysis confirmed a nonlinear TTV trend with $P/|\dot P|\sim (17-30)$ Myr
(1-sigma range), implying only half of the initial decay rate estimation. The
trend significance is at least $3.4$-sigma in the agressively conservative
treatment. Possible radial acceleration due to unseen companions is not
revealed in Doppler data covering seven years 2007-2014, and radial
acceleration of $-15$ m s$^{-1}$yr$^{-1}$ reported in a recent preprint by
another team is not confirmed. If present, it is a very nonlinear RV variation.
Assuming that the entire TTV is tidal in nature, the tidal quality factor
$Q_\star'\sim (4.5-8.5)\cdot 10^4$ does not reveal a convincing disagreement
with available theory predictions.
