Problem with LaTeX table: ErrorL subscription out of bounds

There is an error when generating LaTeX table in shinystan. I've run the model with brms, but this happens when also converting brms code and data to rstan:

library(brms)
library(rstan)
library(shinystan) 

fit <- brm(
    bf(mpg ~ 1 + (1 | cyl) + hp + wt, decomp = "QR"),
    data = mtcars,
    family = gaussian
)

code <- stancode(fit)  
dat <- standata(fit)
fit2 <- stan(model_code = code, data = dat) 
launch_shinystan(fit2) # or `brmsfit` fit

The error only happens when I select Quantile: 97.5%, see pics below:

Start by running the provided R example with brms, rstan, and shinystan, then select Quantile: 97.5% in the generated table view. Trace the LaTeX table generation entry point from launch_shinystan and identify why that quantile causes the bounds error; done means the table generates successfully at 97.5% without the subscription error.